On Thu, Apr 26, 2007 at 05:42:17PM +1000, Nick Piggin wrote: > Actually, I don't know why people are so excited about being able to > use higher order allocations (I would rather be more excited about > never having to use them). But for those few places that really need > it, I'd rather see them use a virtually mapped kernel with proper > defragmentation rather than putting hacks all through the core code.
In memory as on disk, contiguity matters a lot for performance. On Thu, Apr 26, 2007 at 05:42:17PM +1000, Nick Piggin wrote: > I don't think that it is solved, and I think the heuristics that are > there would be put under more stress if they become widely used. And > it isn't only about whether we can get the page or not, but also about > the cost. Look up Linus's arguments about page colouring, which are > similar and I also think are pretty valid. Perhaps broader exposure would help demonstrate their efficacy, or otherwise discover what deficits need to be addressed. -- wli - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/